Expression
An expression is a combination of values, operators, and functions that evaluates to some value.
23 # Prints 23 when run as a cell in a Jupyter notebook -15 + 2.718 # Evaluates to -12.282 4 ** 3 # 64 # Only one value is displayed. Why?
9 + 10
13 / 4
21 # 21 (Jupyter prints the last expression in a code cell automatically.)